Combined starting and retrograde braking mechanism for gasolene-engines.



No. 866,456. PATENTED SEPT. 17. 1907.

. S. G. GEORGE. GOMBINEDSTARTING AND RETROGRADE BRAKING MECHANISM- FOR GASOLBNB mmnwzsn;- APPLIOA'IfION FILED JUNE 23, 1806.

SAMUEL GEORGE, OF SEATTLE, WASHINGTON.

COMBINED STARTING AND BETROGRADE BRA KING mscnnm'su FOR 'ossonnn'n' I ENGINES. i

specification of Letters Patent.

Patented Sept. 17, 1907. v

Application filed June 23,1905. Serial No. 266,583.

To all whom it may concern:

of the United States, residing at Seattle, in the county I' of King and State of Washington, have invented certain-new and useful Improvements in a Combined Startingand Retrograde Braking Mechanism for Gasoreference being had therein to the accompanying draw lene- Engines,-of which the following is 'a specification,

ing, in which 7 Figure l is a longitudinal vertical section of devices embodying my invention; Fig. 2 a side elevation of the same; Fig, 3, an end elevation of Fig. 1; Fig. 4, a sectional view taken on line x-z; of Fig. 2;: and Fig. 5, a perspective view of the power lever detached.

This invention relate silo gasolene engines and while it may be usefully employed in other relations, is especially valuable in this connection.

In starting gasolene engines. it is necessary tocompress the gases already within the cylinder upon one side of the piston for ignition and create a partial I vacuum upon the other side to form a suction fortlie intake of the gases thereat and this is accomplished by rotating through an external medium the engine fly Wheel. oftentimes, too, in tnusstarting an engine the operator requires to use the utmost precaution to avoid being injured by a kicking, or reverse motion being given .the fly wheel through the occurrence of premature explosions of the power agent within the cylinder.

In certain situations where gasolene engines are commonly used, notably on automobiles,thedifficulty in startingitheengine and the -risk of being injured from the back-lash caused by a premature explosion are' particularly objectionable and dangerous from the fact of the engines being placed in an out-of-the-way position. x

The object of the present invention is. to overcome the aforementioned inconveniences and danger, which I attain by the peculiar constructionand adaptation of devices hereinafter described and pointed out in the appended claims.

In the drawings the reference numeral 1 designates the shaft of agasolene engine to which is to be imparted a rotary motion in starting and is provided with A curved track-plate 3, concentric of the wheel axis, is secured in a rigid and substantial manner to supporting' frame-work 4 as by bo1ts5 passing through the latter and the feet 3 of theplate.

A segmental shaped leaf 6 is hinged at one end by a,

pivotal pin 7 to lugs 8 formed or provided on the outside of the track plate in proximity of one of said feet and the otherend of the leaf "terminates in an outwardly inclined portion 6C1, This hinged leaf is resiliently pressed toward the saidplate by a spring 9 interposed between the leaf and a butterfly nut 10 which is adjustable upon a screw-threaded bolt 11 fastened at its inner end to said plate and passing through an elongated aperture of the leaf.

Tiltably attached to the leaf, as by a pin '13 and arms 14, is a brake member 15 carrying at its inner end a brake shoe l6, desirably formed of wood fiber or the like, and'having a fac'elfi which is eccentric of'the members suspension point so that when the leaf is pressed inwardly by the spring, as aforesaid, and the shoe face isin contact with the periphery of the wheel any retrograde motion of the latter will cause a wedge, ing effect tending to compress said spring. To prevent the shoe, however, being carried backwardly beyond a radial plane projected through the axes of the wheel and the pin 13, I provide a, stop 17 on the plate 3 against which the brake member will strike and in so doing it forces the leaf outwardly and disengages the shoe from the wheel, when a coil spring 18, having its respective ends engaged with the leaf and the brake member, will throw the latter forwardly to be reengaged with the wheel in an advanced position by the recoil of the-spring 9. e

'Revolubly mounted on the inside and outside of the track-plate are the antifriction rollers 19 having axles '19 journaled in side plates 20 of a carriage -21 which is nogmally drawn toward the rear by an extensible spring 22 connected to an arm 20 of one .of said side plates and a suitable attachment 'or lug on the track plate, as at 17. A bifurcated lever 23 spans the carriage at its forward end and is fulcrumed thereto, conveniently by utilizing the protruding ends of one of I the roller axles 19 Between the double arm 23 of this lever is secured a shoe 24 similar in form and mate rial, preferably, to the before described shoe 16,; while the outer arm 23 is adapted to be connected to a drag line 25whereby the turning movement of the wheel is accomplished in starting the engine.

The spring 26 coiled about 'a bolt 27 of the carriage stud 28. of the latter and the other end against'the .innor arm of the lever tends to press this arm trrdisengage the shoe 24 thereof out of contact with the periphery of said wheel.

.and havingzorie of its ends bear against an abutment or When the lever arm 23 is drawn forward by power exerted through the line 25 the brake shoe'will be tilted rearwardly, against the action of the last mentioned spring, and cause its being frictionally engaged with the wheel and thus transmit motion to the same and effect its turning in the direction indicated by the ar row in Fig. 2. When the power is released from the drag line the spring 22 draws the carriage in adirection oppositely to that indicated by the arrow and, near the end of this return travel, the rearmost outerroller will contact with the inclined portion 6 of the leaf and,

through a wedging action thereunder, force the leaf outwardly to disengage the brake member-from the wheel, as clearly illustrated in Fig. 1. Shouldthe power transmitting shoe 24 be engaged with the wheel,

' vided upon the inner side of the track plate and located so as to engage with the shoe immediately before or simultaneously with the forcing out of the hinged leaf; The drag line 25 is connected to a lever operated by and within easy reach of the cperator'and which lever can be manipulated either by loot or hand power as is most convenient.

The operation of the invention will ice-understood, it is thought, from the foregoing but it will be stated'that the driving mechanism furnishes the means for rotating the engine hame accomplish the starting of the engine as before alluded to, and the brake devices will reliably check any retrograde rotary motion which may be given to the shaft, thus safeguarding the operator should he still have the controlling lever in his hand. and yet not stop such reverse motion to jeopardize the safety of the. engine itself. In other words, the various features of the invention are so formed and combined as to accommodate themselves to any condition likely topresent itself and is a marked improvement in the art to' which it relates.

Having described m y inventio n, what I claim as new 1. The combination with a wheel, a curved track-plate, a carriage mounted upon said plate and wheel gripping devlc escarrled by said carriage and adapted to engage the wheelwli'en moved in one 'llrectlon, or s lent hinged f to said plate, and adapted when contacted by the carriage to-..be tllted outwardly from the plate and against the action of a spring, said. spling, and an arm carrying a f brake shoe pivotully connected to said leaf.

2. The combination with n=wheel and a curved track-plate, of a carriage mounted upon said plate, devices carried on the carriage-adapted when moved in one direction to grip the periphery of the wheel and impart vu partial rotation, to the latter, :1 spring 'for returning-the carriage to its initial position, and means for holdlngsnld devices out of engagement with the wheel during such return mover nient oi the carriage. I

:l. The comblnatio'nwlth a wheel, a curved track-plate, and a carriage'mounted upon said truck, driving devices provided on the'carriage for imparting a rotm-ymotion to I the wheel in a single direction only, a brake device adapted .to engage with the wheel wheuthe latteris rotating in an opposiledirection to that at which the said driving devices are capable of turning said wheel, and means to cause the said brake device to tempora'rily disengage from the wheel when the latter has made a certain amount 01' retrograde motion. p

4. The comblnatlon wlth. a wheel and a" leaf hinged to a suitable support, of said support, a brake shoe carried by an arm which is .pivotally'connected to said leaf, an a spring pressing said leaf toward the wheel.

In testimony -whereof I afil iz my signature in presence;

of two witnesses.

SAMUEL c. chosen.-

Wltues ses: I I

' lPn-zimn BAimns,

W. .H. BENNETT. 

